diff options
Diffstat (limited to 'arch/mips/momentum/ocelot_3')
| -rw-r--r-- | arch/mips/momentum/ocelot_3/Makefile | 8 | ||||
| -rw-r--r-- | arch/mips/momentum/ocelot_3/int-handler.S | 137 | ||||
| -rw-r--r-- | arch/mips/momentum/ocelot_3/irq.c | 81 | ||||
| -rw-r--r-- | arch/mips/momentum/ocelot_3/ocelot_3_fpga.h | 57 | ||||
| -rw-r--r-- | arch/mips/momentum/ocelot_3/prom.c | 248 | ||||
| -rw-r--r-- | arch/mips/momentum/ocelot_3/reset.c | 59 | ||||
| -rw-r--r-- | arch/mips/momentum/ocelot_3/setup.c | 398 |
7 files changed, 988 insertions, 0 deletions
diff --git a/arch/mips/momentum/ocelot_3/Makefile b/arch/mips/momentum/ocelot_3/Makefile new file mode 100644 index 000000000000..aab8fd89f830 --- /dev/null +++ b/arch/mips/momentum/ocelot_3/Makefile @@ -0,0 +1,8 @@ +# +# Makefile for Momentum Computer's Ocelot-3 board. +# +# Note! Dependencies are done automagically by 'make dep', which also +# removes any old dependencies. DON'T put your own dependencies here +# unless it's something special (ie not a .c file). +# +obj-y += int-handler.o irq.o prom.o reset.o setup.o diff --git a/arch/mips/momentum/ocelot_3/int-handler.S b/arch/mips/momentum/ocelot_3/int-handler.S new file mode 100644 index 000000000000..4522f09ed769 --- /dev/null +++ b/arch/mips/momentum/ocelot_3/int-handler.S @@ -0,0 +1,137 @@ +/* + * Copyright 2002 Momentum Computer Inc. + * Author: Matthew Dharm <mdharm@momenco.com> + * + * Copyright 2001 MontaVista Software Inc. + * Author: jsun@mvista.com or jsun@junsun.net + * + * Copyright 2004 PMC-Sierra + * Author: Manish Lachwani (lachwani@pmc-sierra.com) + * + * Copyright (C) 2004 MontaVista Software Inc. + * Author: Manish Lachwani, mlachwani@mvista.com + * + * First-level interrupt dispatcher for Ocelot-3 board. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ +#include <asm/asm.h> +#include <asm/mipsregs.h> +#include <asm/addrspace.h> +#include <asm/regdef.h> +#include <asm/stackframe.h> + +/* + * First level interrupt dispatcher for Ocelot-3 board + */ + .align 5 + NESTED(ocelot3_handle_int, PT_SIZE, sp) + SAVE_ALL + CLI + .set at + + mfc0 t0, CP0_CAUSE + mfc0 t2, CP0_STATUS + + and t0, t2 + + andi t1, t0, STATUSF_IP0 /* sw0 software interrupt (IRQ0) */ + bnez t1, ll_sw0_irq + + andi t1, t0, STATUSF_IP1 /* sw1 software interrupt (IRQ1) */ + bnez t1, ll_sw1_irq + + andi t1, t0, STATUSF_IP2 /* int0 hardware line (IRQ2) */ + bnez t1, ll_pci0slot1_irq + + andi t1, t0, STATUSF_IP3 /* int1 hardware line (IRQ3) */ + bnez t1, ll_pci0slot2_irq + + andi t1, t0, STATUSF_IP4 /* int2 hardware line (IRQ4) */ + bnez t1, ll_pci1slot1_irq + + andi t1, t0, STATUSF_IP5 /* int3 hardware line (IRQ5) */ + bnez t1, ll_pci1slot2_irq + + andi t1, t0, STATUSF_IP6 /* int4 hardware line (IRQ6) */ + bnez t1, ll_uart_irq + + andi t1, t0, STATUSF_IP7 /* cpu timer (IRQ7) */ + bnez t1, ll_cputimer_irq + + /* now look at extended interrupts */ + mfc0 t0, CP0_CAUSE + cfc0 t1, CP0_S1_INTCONTROL + + /* shift the mask 8 bits left to line up the bits */ + sll t2, t1, 8 + + and t0, t2 + srl t0, t0, 16 + + andi t1, t0, STATUSF_IP8 /* int6 hardware line (IRQ9) */ + bnez t1, ll_mv64340_decode_irq + + .set reorder + + /* wrong alarm or masked ... */ + j spurious_interrupt + nop + END(ocelot3_handle_int) + + .align 5 +ll_sw0_irq: + li a0, 0 /* IRQ 1 */ + move a1, sp + jal do_IRQ + j ret_from_irq +ll_sw1_irq: + li a0, 1 /* IRQ 2 */ + move a1, sp + jal do_IRQ + j ret_from_irq + +ll_pci0slot1_irq: + li a0, 2 /* IRQ 3 */ + move a1, sp + jal do_IRQ + j ret_from_irq + +ll_pci0slot2_irq: + li a0, 3 /* IRQ 4 */ + move a1, sp + jal do_IRQ + j ret_from_irq + +ll_pci1slot1_irq: + li a0, 4 /* IRQ 5 */ + move a1, sp + jal do_IRQ + j ret_from_irq + +ll_pci1slot2_irq: + li a0, 5 /* IRQ 6 */ + move a1, sp + jal do_IRQ + j ret_from_irq + +ll_uart_irq: + li a0, 6 /* IRQ 7 */ + move a1, sp + jal do_IRQ + j ret_from_irq + +ll_cputimer_irq: + li a0, 7 /* IRQ 8 */ + move a1, sp + jal do_IRQ + j ret_from_irq + +ll_mv64340_decode_irq: + move a0, sp + jal ll_mv64340_irq + j ret_from_irq + diff --git a/arch/mips/momentum/ocelot_3/irq.c b/arch/mips/momentum/ocelot_3/irq.c new file mode 100644 index 000000000000..42464dbd4ad2 --- /dev/null +++ b/arch/mips/momentum/ocelot_3/irq.c @@ -0,0 +1,81 @@ +/* + * Copyright (C) 2000 RidgeRun, Inc. + * Author: RidgeRun, Inc. + * glonnon@ridgerun.com, skranz@ridgerun.com, stevej@ridgerun.com + * + * Copyright 2001 MontaVista Software Inc. + * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net + * Copyright (C) 2000, 2001 Ralf Baechle (ralf@gnu.org) + * + * Copyright 2004 PMC-Sierra + * Author: Manish Lachwani (lachwani@pmc-sierra.com) + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + * + * Copyright (C) 2004 MontaVista Software Inc. + * Author: Manish Lachwani, mlachwani@mvista.com + * + */ +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/kernel_stat.h> +#include <linux/module.h> +#include <linux/signal.h> +#include <linux/sched.h> +#include <linux/types.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/timex.h> +#include <linux/slab.h> +#include <linux/random.h> +#include <asm/bitops.h> +#include <asm/bootinfo.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/mipsregs.h> +#include <asm/system.h> + +extern asmlinkage void ocelot3_handle_int(void); + +static struct irqaction cascade_mv64340 = { + no_action, SA_INTERRUPT, CPU_MASK_NONE, "MV64340-Cascade", NULL, NULL +}; + +void __init arch_init_irq(void) +{ + /* + * Clear all of the interrupts while we change the able around a bit. + * int-handler is not on bootstrap + */ + clear_c0_status(ST0_IM | ST0_BEV); + + /* Sets the first-level interrupt dispatcher. */ + set_except_vector(0, ocelot3_handle_int); + mips_cpu_irq_init(0); + rm7k_cpu_irq_init(8); + + /* set up the cascading interrupts */ + setup_irq(8, &cascade_mv64340); /* unmask intControl IM8, IRQ 9 */ + mv64340_irq_init(16); + + set_c0_status(ST0_IM); /* IE in the status register */ + +} diff --git a/arch/mips/momentum/ocelot_3/ocelot_3_fpga.h b/arch/mips/momentum/ocelot_3/ocelot_3_fpga.h new file mode 100644 index 000000000000..227e429fe720 --- /dev/null +++ b/arch/mips/momentum/ocelot_3/ocelot_3_fpga.h @@ -0,0 +1,57 @@ +/* + * Ocelot-3 Board Register Definitions + * + * (C) 2002 Momentum Computer Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + * + * Louis Hamilton, Red Hat, Inc. + * hamilton@redhat.com [MIPS64 modifications] + * + * Copyright (C) 2004 MontaVista Software Inc. + * Author: Manish Lachwani, mlachwani@mvista.com + */ + +#ifndef __OCELOT_3_FPGA_H__ +#define __OCELOT_3_FPGA_H__ + +#define OCELOT_3_REG_BOARDREV 0x0 +#define OCELOT_3_REG_FPGA_REV 0x1 +#define OCELOT_3_REG_FPGA_TYPE 0x2 +#define OCELOT_3_REG_RESET_STATUS 0x3 +#define OCELOT_3_REG_BOARD_STATUS 0x4 +#define OCELOT_3_REG_CPCI_ID 0x5 +#define OCELOT_3_REG_SET 0x6 +#define OCELOT_3_REG_CLR 0x7 +#define OCELOT_3_REG_EEPROM_MODE 0x9 +#define OCELOT_3_REG_INTMASK 0xa +#define OCELOT_3_REG_INTSTAT 0xb +#define OCELOT_3_REG_UART_INTMASK 0xc +#define OCELOT_3_REG_UART_INTSTAT 0xd +#define OCELOT_3_REG_INTSET 0xe +#define OCELOT_3_REG_INTCLR 0xf + +extern unsigned long ocelot_fpga_base; + +#define OCELOT_FPGA_WRITE(x, y) writeb(x, ocelot_fpga_base + OCELOT_3_REG_##y) +#define OCELOT_FPGA_READ(x) readb(ocelot_fpga_base + OCELOT_3_REG_##x) + +#endif diff --git a/arch/mips/momentum/ocelot_3/prom.c b/arch/mips/momentum/ocelot_3/prom.c new file mode 100644 index 000000000000..89c17a0c0bed --- /dev/null +++ b/arch/mips/momentum/ocelot_3/prom.c @@ -0,0 +1,248 @@ +/* + * Copyright 2002 Momentum Computer Inc. + * Author: Matthew Dharm <mdharm@momenco.com> + * + * Louis Hamilton, Red Hat, Inc. + * hamilton@redhat.com [MIPS64 modifications] + * + * Copyright 2004 PMC-Sierra + * Author: Manish Lachwani (lachwani@pmc-sierra.com) + * + * Based on Ocelot Linux port, which is + * Copyright 2001 MontaVista Software Inc. + * Author: jsun@mvista.com or jsun@junsun.net + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * Copyright (C) 2004 MontaVista Software Inc. + * Author: Manish Lachwani, mlachwani@mvista.com + * + */ +#include <linux/config.h> +#include <linux/init.h> +#include <linux/bootmem.h> +#include <linux/mv643xx.h> + +#include <asm/addrspace.h> +#include <asm/bootinfo.h> +#include <asm/pmon.h> +#include "ocelot_3_fpga.h" + +struct callvectors* debug_vectors; +extern unsigned long marvell_base; +extern unsigned long cpu_clock; + +#ifdef CONFIG_MV643XX_ETH +extern unsigned char prom_mac_addr_base[6]; +#endif + +const char *get_system_type(void) +{ + return "Momentum Ocelot-3"; +} + +#ifdef CONFIG_MV643XX_ETH +void burn_clocks(void) +{ + int i; + + /* this loop should burn at least 1us -- this should be plenty */ + for (i = 0; i < 0x10000; i++) + ; +} + +u8 exchange_bit(u8 val, u8 cs) +{ + /* place the data */ + OCELOT_FPGA_WRITE((val << 2) | cs, EEPROM_MODE); + burn_clocks(); + + /* turn the clock on */ + OCELOT_FPGA_WRITE((val << 2) | cs | 0x2, EEPROM_MODE); + burn_clocks(); + + /* turn the clock off and read-strobe */ + OCELOT_FPGA_WRITE((val << 2) | cs | 0x10, EEPROM_MODE); + + /* return the data */ + return ((OCELOT_FPGA_READ(EEPROM_MODE) >> 3) & 0x1); +} + +void get_mac(char dest[6]) +{ + u8 read_opcode[12] = {1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; + int i,j; + + for (i = 0; i < 12; i++) + exchange_bit(read_opcode[i], 1); + + for (j = 0; j < 6; j++) { + dest[j] = 0; + for (i = 0; i < 8; i++) { + dest[j] <<= 1; + dest[j] |= exchange_bit(0, 1); + } + } + + /* turn off CS */ + exchange_bit(0,0); +} +#endif + + +#ifdef CONFIG_MIPS64 + +unsigned long signext(unsigned long addr) +{ + addr &= 0xffffffff; + return (unsigned long)((int)addr); +} + +void *get_arg(unsigned long args, int arc) +{ + unsigned long ul; + unsigned char *puc, uc; + + args += (arc * 4); + ul = (unsigned long)signext(args); + puc = (unsigned char *)ul; + if (puc == 0) + return (void *)0; + +#ifdef CONFIG_CPU_LITTLE_ENDIAN + uc = *puc++; + ul = (unsigned long)uc; + uc = *puc++; + ul |= (((unsigned long)uc) << 8); + uc = *puc++; + ul |= (((unsigned long)uc) << 16); + uc = *puc++; + ul |= (((unsigned long)uc) << 24); +#else /* CONFIG_CPU_LITTLE_ENDIAN */ + uc = *puc++; + ul = ((unsigned long)uc) << 24; + uc = *puc++; + ul |= (((unsigned long)uc) << 16); + uc = *puc++; + ul |= (((unsigned long)uc) << 8); + uc = *puc++; + ul |= ((unsigned long)uc); +#endif /* CONFIG_CPU_LITTLE_ENDIAN */ + ul = signext(ul); + return (void *)ul; +} + +char *arg64(unsigned long addrin, int arg_index) +{ + unsigned long args; + char *p; + + args = signext(addrin); + p = (char *)get_arg(args, arg_index); + + return p; +} +#endif /* CONFIG_MIPS64 */ + +void __init prom_init(void) +{ + int argc = fw_arg0; + char **arg = (char **) fw_arg1; + char **env = (char **) fw_arg2; + struct callvectors *cv = (struct callvectors *) fw_arg3; + int i; + +#ifdef CONFIG_MIPS64 + char *ptr; + printk("prom_init - MIPS64\n"); + + /* save the PROM vectors for debugging use */ + debug_vectors = (struct callvectors *)signext((unsigned long)cv); + + /* arg[0] is "g", the rest is boot parameters */ + arcs_cmdline[0] = '\0'; + + for (i = 1; i < argc; i++) { + ptr = (char *)arg64((unsigned long)arg, i); + if ((strlen(arcs_cmdline) + strlen(ptr) + 1) >= + sizeof(arcs_cmdline)) + break; + strcat(arcs_cmdline, ptr); + strcat(arcs_cmdline, " "); + } + i = 0; + + while (1) { + ptr = (char *)arg64((unsigned long)env, i); + if (! ptr) + break; + + if (strncmp("gtbase", ptr, strlen("gtbase")) == 0) { + marvell_base = simple_strtol(ptr + strlen("gtbase="), + NULL, 16); + + if ((marvell_base & 0xffffffff00000000) == 0) + marvell_base |= 0xffffffff00000000; + + printk("marvell_base set to 0x%016lx\n", marvell_base); + } + if (strncmp("cpuclock", ptr, strlen("cpuclock")) == 0) { + cpu_clock = simple_strtol(ptr + strlen("cpuclock="), + NULL, 10); + printk("cpu_clock set to %d\n", cpu_clock); + } + i++; + } + printk("arcs_cmdline: %s\n", arcs_cmdline); + +#else /* CONFIG_MIPS64 */ + + /* save the PROM vectors for debugging use */ + debug_vectors = cv; + + /* arg[0] is "g", the rest is boot parameters */ + arcs_cmdline[0] = '\0'; + for (i = 1; i < argc; i++) { + if (strlen(arcs_cmdline) + strlen(arg[i] + 1) + >= sizeof(arcs_cmdline)) + break; + strcat(arcs_cmdline, arg[i]); + strcat(arcs_cmdline, " "); + } + + while (*env) { + if (strncmp("gtbase", *env, strlen("gtbase")) == 0) { + marvell_base = simple_strtol(*env + strlen("gtbase="), + NULL, 16); + } + if (strncmp("cpuclock", *env, strlen("cpuclock")) == 0) { + cpu_clock = simple_strtol(*env + strlen("cpuclock="), + NULL, 10); + } + env++; + } +#endif /* CONFIG_MIPS64 */ + + mips_machgroup = MACH_GROUP_MOMENCO; + mips_machtype = MACH_MOMENCO_OCELOT_3; + +#ifdef CONFIG_MV643XX_ETH + /* get the base MAC address for on-board ethernet ports */ + get_mac(prom_mac_addr_base); +#endif + +#ifndef CONFIG_MIPS64 + debug_vectors->printf("Booting Linux kernel...\n"); +#endif +} + +void __init prom_free_prom_memory(void) +{ +} + +void __init prom_fixup_mem_map(unsigned long start, unsigned long end) +{ +} diff --git a/arch/mips/momentum/ocelot_3/reset.c b/arch/mips/momentum/ocelot_3/reset.c new file mode 100644 index 000000000000..72b4423c0864 --- /dev/null +++ b/arch/mips/momentum/ocelot_3/reset.c @@ -0,0 +1,59 @@ +/* + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * Copyright (C) 1997, 01, 05 Ralf Baechle + * Copyright 2001 MontaVista Software Inc. + * Author: jsun@mvista.com or jsun@junsun.net + * + * Copyright (C) 2002 Momentum Computer Inc. + * Author: Matthew Dharm <mdharm@momenco.com> + * + * Louis Hamilton, Red Hat, Inc. + * hamilton@redhat.com [MIPS64 modifications] + * + * Copyright 2004 PMC-Sierra + * Author: Manish Lachwani (lachwani@pmc-sierra.com) + * + * Copyright (C) 2004 MontaVista Software Inc. + * Author: Manish Lachwani, mlachwani@mvista.com + */ +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/delay.h> +#include <asm/io.h> +#include <asm/pgtable.h> +#include <asm/processor.h> +#include <asm/reboot.h> +#include <asm/system.h> + +void momenco_ocelot_restart(char *command) +{ + /* base address of timekeeper portion of part */ + void *nvram = (void *) 0xfc807000L; + + /* Ask the NVRAM/RTC/watchdog chip to assert reset in 1/16 second */ + writeb(0x84, nvram + 0xff7); + + /* wait for the watchdog to go off */ + mdelay(100+(1000/16)); + + /* if the watchdog fails for some reason, let people know */ + printk(KERN_NOTICE "Watchdog reset failed\n"); +} + +void momenco_ocelot_halt(void) +{ + printk(KERN_NOTICE "\n** You can safely turn off the power\n"); + while (1) + __asm__(".set\tmips3\n\t" + "wait\n\t" + ".set\tmips0"); +} + +void momenco_ocelot_power_off(void) +{ + momenco_ocelot_halt(); +} diff --git a/arch/mips/momentum/ocelot_3/setup.c b/arch/mips/momentum/ocelot_3/setup.c new file mode 100644 index 000000000000..ce2efcbab7aa --- /dev/null +++ b/arch/mips/momentum/ocelot_3/setup.c @@ -0,0 +1,398 @@ +/* + * setup.c + * + * BRIEF MODULE DESCRIPTION + * Momentum Computer Ocelot-3 board dependent boot routines + * + * Copyright (C) 1996, 1997, 01, 05 Ralf Baechle + * Copyright (C) 2000 RidgeRun, Inc. + * Copyright (C) 2001 Red Hat, Inc. + * Copyright (C) 2002 Momentum Computer + * + * Author: Matthew Dharm, Momentum Computer + * mdharm@momenco.com + * + * Louis Hamilton, Red Hat, Inc. + * hamilton@redhat.com [MIPS64 modifications] + * + * Author: RidgeRun, Inc. + * glonnon@ridgerun.com, skranz@ridgerun.com, stevej@ridgerun.com + * + * Copyright 2001 MontaVista Software Inc. + * Author: jsun@mvista.com or jsun@junsun.net + * + * Copyright 2004 PMC-Sierra + * Author: Manish Lachwani (lachwani@pmc-sierra.com) + * + * Copyright (C) 2004 MontaVista Software Inc. + * Author: Manish Lachwani, mlachwani@mvista.com + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + */ +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/mc146818rtc.h> +#include <linux/ioport.h> +#include <linux/interrupt.h> +#include <linux/pci.h> +#include <linux/timex.h> +#include <linux/bootmem.h> +#include <linux/mv643xx.h> +#include <asm/time.h> +#include <asm/page.h> +#include <asm/bootinfo.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/pci.h> +#include <asm/processor.h> +#include <asm/ptrace.h> +#include <asm/reboot.h> +#include <asm/mc146818rtc.h> +#include <asm/tlbflush.h> +#include "ocelot_3_fpga.h" + +/* Marvell Discovery Register Base */ +unsigned long marvell_base = (signed)0xf4000000; + +/* CPU clock */ +unsigned long cpu_clock; + +/* RTC/NVRAM */ +unsigned char* rtc_base = (unsigned char*)(signed)0xfc800000; + +/* FPGA Base */ +unsigned long ocelot_fpga_base = (signed)0xfc000000; + +/* Serial base */ +unsigned long uart_base = (signed)0xfd000000; + +/* + * Marvell Discovery SRAM. This is one place where Ethernet + * Tx and Rx descriptors can be placed to improve performance + */ +extern unsigned long mv64340_sram_base; + +/* These functions are used for rebooting or halting the machine*/ +extern void momenco_ocelot_restart(char *command); +extern void momenco_ocelot_halt(void); +extern void momenco_ocelot_power_off(void); + +void momenco_time_init(void); +static char reset_reason; + +void add_wired_entry(unsigned long entrylo0, unsigned long entrylo1, + unsigned long entryhi, unsigned long pagemask); + +static inline unsigned long ENTRYLO(unsigned long paddr) +{ + return ((paddr & PAGE_MASK) | + (_PAGE_PRESENT | __READABLE | __WRITEABLE | _PAGE_GLOBAL | + _CACHE_UNCACHED)) >> 6; +} + +void __init bus_error_init(void) +{ + /* nothing */ +} + +/* + * setup code for a handoff from a version 2 PMON 2000 PROM + */ +void setup_wired_tlb_entries(void) +{ + write_c0_wired(0); + local_flush_tlb_all(); + + /* marvell and extra space */ + add_wired_entry(ENTRYLO(0xf4000000), ENTRYLO(0xf4010000), (signed)0xf4000000, PM_64K); + + /* fpga, rtc, and uart */ + add_wired_entry(ENTRYLO(0xfc000000), ENTRYLO(0xfd000000), (signed)0xfc000000, PM_16M); +} + +#define CONV_BCD_TO_BIN(val) (((val) & 0xf) + (((val) >> 4) * 10)) +#define CONV_BIN_TO_BCD(val) (((val) % 10) + (((val) / 10) << 4)) + +unsigned long m48t37y_get_time(void) +{ + unsigned int year, month, day, hour, min, sec; + + /* stop the update */ + rtc_base[0x7ff8] = 0x40; + + year = CONV_BCD_TO_BIN(rtc_base[0x7fff]); + year += CONV_BCD_TO_BIN(rtc_base[0x7ff1]) * 100; + + month = CONV_BCD_TO_BIN(rtc_base[0x7ffe]); + + day = CONV_BCD_TO_BIN(rtc_base[0x7ffd]); + + hour = CONV_BCD_TO_BIN(rtc_base[0x7ffb]); + min = CONV_BCD_TO_BIN(rtc_base[0x7ffa]); + sec = CONV_BCD_TO_BIN(rtc_base[0x7ff9]); + + /* start the update */ + rtc_base[0x7ff8] = 0x00; + + return mktime(year, month, day, hour, min, sec); +} + +int m48t37y_set_time(unsigned long sec) +{ + struct rtc_time tm; + + /* convert to a more useful format -- note months count from 0 */ + to_tm(sec, &tm); + tm.tm_mon += 1; + + /* enable writing */ + rtc_base[0x7ff8] = 0x80; + + /* year */ + rtc_base[0x7fff] = CONV_BIN_TO_BCD(tm.tm_year % 100); + rtc_base[0x7ff1] = CONV_BIN_TO_BCD(tm.tm_year / 100); + + /* month */ + rtc_base[0x7ffe] = CONV_BIN_TO_BCD(tm.tm_mon); + + /* day */ + rtc_base[0x7ffd] = CONV_BIN_TO_BCD(tm.tm_mday); + + /* hour/min/sec */ + rtc_base[0x7ffb] = CONV_BIN_TO_BCD(tm.tm_hour); + rtc_base[0x7ffa] = CONV_BIN_TO_BCD(tm.tm_min); + rtc_base[0x7ff9] = CONV_BIN_TO_BCD(tm.tm_sec); + + /* day of week -- not really used, but let's keep it up-to-date */ + rtc_base[0x7ffc] = CONV_BIN_TO_BCD(tm.tm_wday + 1); + + /* disable writing */ + rtc_base[0x7ff8] = 0x00; + + return 0; +} + +void momenco_timer_setup(struct irqaction *irq) +{ + setup_irq(7, irq); /* Timer interrupt, unmask status IM7 */ +} + +void momenco_time_init(void) +{ + setup_wired_tlb_entries(); + + /* + * Ocelot-3 board has been built with both + * the Rm7900 and the Rm7065C + */ + mips_hpt_frequency = cpu_clock / 2; + board_timer_setup = momenco_timer_setup; + + rtc_get_time = m48t37y_get_time; + rtc_set_time = m48t37y_set_time; +} + +/* + * PCI Support for Ocelot-3 + */ + +/* Bus #0 IO and MEM space */ +#define OCELOT_3_PCI_IO_0_START 0xe0000000 +#define OCELOT_3_PCI_IO_0_SIZE 0x08000000 +#define OCELOT_3_PCI_MEM_0_START 0xc0000000 +#define OCELOT_3_PCI_MEM_0_SIZE 0x10000000 + +/* Bus #1 IO and MEM space */ +#define OCELOT_3_PCI_IO_1_START 0xe8000000 +#define OCELOT_3_PCI_IO_1_SIZE 0x08000000 +#define OCELOT_3_PCI_MEM_1_START 0xd0000000 +#define OCELOT_3_PCI_MEM_1_SIZE 0x10000000 + +static struct resource mv_pci_io_mem0_resource = { + .name = "MV64340 PCI0 IO MEM", + .start = OCELOT_3_PCI_IO_0_START, + .end = OCELOT_3_PCI_IO_0_START + OCELOT_3_PCI_IO_0_SIZE - 1, + .flags = IORESOURCE_IO, +}; + +static struct resource mv_pci_io_mem1_resource = { + .name = "MV64340 PCI1 IO MEM", + .start = OCELOT_3_PCI_IO_1_START, + .end = OCELOT_3_PCI_IO_1_START + OCELOT_3_PCI_IO_1_SIZE - 1, + .flags = IORESOURCE_IO, +}; + +static struct resource mv_pci_mem0_resource = { + .name = "MV64340 PCI0 MEM", + .start = OCELOT_3_PCI_MEM_0_START, + .end = OCELOT_3_PCI_MEM_0_START + OCELOT_3_PCI_MEM_0_SIZE - 1, + .flags = IORESOURCE_MEM, +}; + +static struct resource mv_pci_mem1_resource = { + .name = "MV64340 PCI1 MEM", + .start = OCELOT_3_PCI_MEM_1_START, + .end = OCELOT_3_PCI_MEM_1_START + OCELOT_3_PCI_MEM_1_SIZE - 1, + .flags = IORESOURCE_MEM, +}; + +static struct mv_pci_controller mv_bus0_controller = { + .pcic = { + .pci_ops = &mv_pci_ops, + .mem_resource = &mv_pci_mem0_resource, + .io_resource = &mv_pci_io_mem0_resource, + }, + .config_addr = MV64340_PCI_0_CONFIG_ADDR, + .config_vreg = MV64340_PCI_0_CONFIG_DATA_VIRTUAL_REG, +}; + +static struct mv_pci_controller mv_bus1_controller = { + .pcic = { + .pci_ops = &mv_pci_ops, + .mem_resource = &mv_pci_mem1_resource, + .io_resource = &mv_pci_io_mem1_resource, + }, + .config_addr = MV64340_PCI_1_CONFIG_ADDR, + .config_vreg = MV64340_PCI_1_CONFIG_DATA_VIRTUAL_REG, +}; + +static __init int __init ja_pci_init(void) +{ + uint32_t enable; + extern int pci_probe_only; + + /* PMON will assign PCI resources */ + pci_probe_only = 1; + + enable = ~MV_READ(MV64340_BASE_ADDR_ENABLE); + /* + * We require at least one enabled I/O or PCI memory window or we + * will ignore this PCI bus. We ignore PCI windows 1, 2 and 3. + */ + if (enable & (0x01 << 9) || enable & (0x01 << 10)) + register_pci_controller(&mv_bus0_controller.pcic); + + if (enable & (0x01 << 14) || enable & (0x01 << 15)) + register_pci_controller(&mv_bus1_controller.pcic); + + ioport_resource.end = OCELOT_3_PCI_IO_0_START + OCELOT_3_PCI_IO_0_SIZE + + OCELOT_3_PCI_IO_1_SIZE - 1; + + iomem_resource.end = OCELOT_3_PCI_MEM_0_START + OCELOT_3_PCI_MEM_0_SIZE + + OCELOT_3_PCI_MEM_1_SIZE - 1; + + set_io_port_base(OCELOT_3_PCI_IO_0_START); /* mips_io_port_base */ + + return 0; +} + +arch_initcall(ja_pci_init); + +static int __init momenco_ocelot_3_setup(void) +{ + unsigned int tmpword; + + board_time_init = momenco_time_init; + + _machine_restart = momenco_ocelot_restart; + _machine_halt = momenco_ocelot_halt; + _machine_power_off = momenco_ocelot_power_off; + + /* Wired TLB entries */ + setup_wired_tlb_entries(); + + /* shut down ethernet ports, just to be sure our memory doesn't get + * corrupted by random ethernet traffic. + */ + MV_WRITE(MV64340_ETH_TRANSMIT_QUEUE_COMMAND_REG(0), 0xff << 8); + MV_WRITE(MV64340_ETH_TRANSMIT_QUEUE_COMMAND_REG(1), 0xff << 8); + MV_WRITE(MV64340_ETH_RECEIVE_QUEUE_COMMAND_REG(0), 0xff << 8); + MV_WRITE(MV64340_ETH_RECEIVE_QUEUE_COMMAND_REG(1), 0xff << 8); + do {} + while (MV_READ(MV64340_ETH_RECEIVE_QUEUE_COMMAND_REG(0)) & 0xff); + do {} + while (MV_READ(MV64340_ETH_RECEIVE_QUEUE_COMMAND_REG(1)) & 0xff); + do {} + while (MV_READ(MV64340_ETH_TRANSMIT_QUEUE_COMMAND_REG(0)) & 0xff); + do {} + while (MV_READ(MV64340_ETH_TRANSMIT_QUEUE_COMMAND_REG(1)) & 0xff); + MV_WRITE(MV64340_ETH_PORT_SERIAL_CONTROL_REG(0), + MV_READ(MV64340_ETH_PORT_SERIAL_CONTROL_REG(0)) & ~1); + MV_WRITE(MV64340_ETH_PORT_SERIAL_CONTROL_REG(1), + MV_READ(MV64340_ETH_PORT_SERIAL_CONTROL_REG(1)) & ~1); + + /* Turn off the Bit-Error LED */ + OCELOT_FPGA_WRITE(0x80, CLR); + + tmpword = OCELOT_FPGA_READ(BOARDREV); + if (tmpword < 26) + printk("Momenco Ocelot-3: Board Assembly Rev. %c\n", + 'A'+tmpword); + else + printk("Momenco Ocelot-3: Board Assembly Revision #0x%x\n", + tmpword); + + tmpword = OCELOT_FPGA_READ(FPGA_REV); + printk("FPGA Rev: %d.%d\n", tmpword>>4, tmpword&15); + tmpword = OCELOT_FPGA_READ(RESET_STATUS); + printk("Reset reason: 0x%x\n", tmpword); + switch (tmpword) { + case 0x1: + printk(" - Power-up reset\n"); + break; + case 0x2: + printk(" - Push-button reset\n"); + break; + case 0x4: + printk(" - cPCI bus reset\n"); + break; + case 0x8: + printk(" - Watchdog reset\n"); + break; + case 0x10: + printk(" - Software reset\n"); + break; + default: + printk(" - Unknown reset cause\n"); + } + reset_reason = tmpword; + OCELOT_FPGA_WRITE(0xff, RESET_STATUS); + + tmpword = OCELOT_FPGA_READ(CPCI_ID); + printk("cPCI ID register: 0x%02x\n", tmpword); + printk(" - Slot number: %d\n", tmpword & 0x1f); + printk(" - PCI bus present: %s\n", tmpword & 0x40 ? "yes" : "no"); + printk(" - System Slot: %s\n", tmpword & 0x20 ? "yes" : "no"); + + tmpword = OCELOT_FPGA_READ(BOARD_STATUS); + printk("Board Status register: 0x%02x\n", tmpword); + printk(" - User jumper: %s\n", (tmpword & 0x80)?"installed":"absent"); + printk(" - Boot flash write jumper: %s\n", (tmpword&0x40)?"installed":"absent"); + printk(" - L3 cache size: %d MB\n", (1<<((tmpword&12) >> 2))&~1); + + /* Support for 128 MB memory */ + add_memory_region(0x0, 0x08000000, BOOT_MEM_RAM); + + return 0; +} + +early_initcall(momenco_ocelot_3_setup); |
